Flagellated found in the Rio de la Plata, Cuchilla Alta, Canelones, Uruguay, South America.
Body approximately 3um long.
A long posterior flagellum and a shorter anterior flagellum which moves quickly when swimming.
A lateral "mouth" visible in the video.
I thank all those who advised me in the identification of this organism.
Phase contrast, 100X immersion objective
GH4 panasonic camera with and without 3X zoom.
Music: guitarist Victor Gomez
Video link:
https://www.youtube.com/watch?v=udC-IxNAX78
Frame only for preview:
Regards
carlos